I know I'm stretching the definition of Celebrity a little, but hey, if Shakespeare could stretch meanings, then so can I.
The book Dianetics: The Modern Science of Mental Health has been a bestseller since it's publication on May 9th, 1950. I think a book that has sold well over 20 million copies, continues to sell a new copy every 4.8 seconds and has been translated into over 50 languages definitely qualifies as a celebrity.
So here is a video all about the book and the movement it created.
A culture is only as great as its dreams, and its dreams are dreamed by artists. — Scientology founder L. Ron Hubbard